This is the engine house of the now disused
Dinting Railway Museum. It closed 20 years ago, in 1991; it's amazing how quickly nature takes places back. A video with more footage of how this looks currently (it was made last year) is
here. Last year, the land was bought by a private individual or entity (I'm not sure which); I do wonder what they're going to do with the land, as it's not very accessible to roads.
The old Dinting Railway Museum, Glossop, 24 July 2011